Mounting for a telephone substation ringer



aNvENToR JOSEPH F. HOUDEK. JR.

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Patented Aug. 26, 1952 MOUNTING FOR A TELEPHONE SUBSTATION RINGER JosephF. Houdck, Jr., Elmhurst, Ill., assgnor, by mesne assignments, toKellogg Switchboard and Supply Company, a corporation `of Dela- WareOriginal application May 16, 1946, Serial No. 670,265. Divided and thisapplication May 15, 1950, Serial No. 162,067

` Claims.

This appli-cation is a division of my application Serial number 670,265,led May 16, 1946, now Patent No. 2,516,214 of July 25, 1950.

This invention relates to a mounting for a telephone substation ringer.Its principal object is to provide a simple and economical mountingarrangement for ringers which is suiciently flexible that only a minimumof the clatter incident to operation of the armature thereof istransmitted, while holding the ringer suiiiciently rigid that theintended operation thereof is not impaired.

The incidental objects and the features of the invention will becomeapparent as the description progresses.

Figs'. 1 and 2 are respectively a top View and a rear view of thenon-tuned ringer mounted on a supporting base plate.

Fig. 3 is a side sectional view of the device of Figs. 1 and 2 takengenerally along line 3--3 of Fig. 1. I

The ringer herein shown may be described as a biased ringer in that thearmature is biased to stand normally in association with oneelectromagnet, as shown. It includes a foundation assembly and partsmounted thereon. The foundation assembly comprises parts 2 and 4 securedtogether, as by rivets 3. Part 2 comprises a mounting strap ofrelatively thin and comparatively springy material, While part 4 is anon-magnetic foundation plate to which the other parts going to make upthe ringer are attached.

` `The complete ringer is shown mounted on base plate I`, which hasraised bosses (Figs. 2 and 3), tapped to receive mounting screws I3. Allparts of the ringer are thus held out of direct contact with base plateI, such contact as exists between the ringer and baserplate being by wayof the comparatively thin and exible mounting strip (or strap) 2. Directtransmission of clatter, incident to the armature of the mechanismstriking the ends of the electromagnets, and incident to the clapperstriking the gongs. is materially reduced by this simple illustratedstrip mounting.

Foundation plate 4 is provided at the front with arms 5, tapped toreceive screws mounting gongs |4 respectively thereto.

The rear portion of plate 4 has a portion sheared end struck uptherefrom to provide upstanding wall portion 8, supporting therearwardly extending horizontal portion 9, ending in tab I0. A hole isprovided through part 9 and through the underlying main portion offoundation plate 4 to receive pivot rod 32 for mounting armature 30.

The armature assembly of the device of Figs. l to 3 includes armature 30which has upper and CII lower ears 3|, pierced to receive pivot rod 32.The upper ear 3| is sheared and struck up from the armature, leaving anopening in the armature through which the rearwardly extending part 9 offoundation assembly 4 freely passes. Armature 30 is provided withnon-magnetic coreengaging members 33 applied in the form of rivets.Their well-understood function is to reduce the tendency of thearmatureto "freeze in either of its two extreme positions.

The rear end of clapper rod 34 is suitably upset to provide an enlargedportion through which it is secured to the armature, as by riveting. Theclapper 35 is mounted on the front end of the rod 34 in a position tostrike the gongs I4 alternately as the armature turns back and forthabout pivot rod 32.

The illustrated ringer, being of the biased type as noted, is providedwith bias spring 36, comprising a round reed forced into a hole inarmature 30, the front end entering an eccentric opening inbias-adjusting member 31. Spring 36 thus exerts a normal force on thearmature causing it to return to the illustrated position after everyuse thereof, whereby, when in normal position, it is not affected bycurrent ow in a given direction.

The magnet assembly includes electromagnets having cores 25 and windings4D, permanent bar magnet 24, and the common yoke 2| of magneticmaterial.

The magnetic yoke 2| ha-s a horizontal part, which overlies foundationplate 4 in assembled position, and a vertical part which is pierced toreceive the shouldered front end of electromagnet cores 25. These coresmay be held in part 2|, as by the illustrated spring washers, or speednuts 26, each of which has inwardly extending parts which snap into anannular groove inthe reduced end portion of its core 25. `Core-s 25 arethus held yieldingly, whereby sliding of the assembly is not materiallyaffected by minor displacement of the location of receiving holes l inthe upstanding rear portion 8 of foundation plate 4.

The front end of permanent bar magnet 24 enters an accurately sizedopening in the upstanding portion of yoke 2|. This opening is producedby a shearing action which provides the rearwardly extending central tab23, which underlies the front end of magnet 24. Parts 23 and 24 aresecured rigidly together as by welding.

Yoke 2| is provided with a front tab 22which is tapped and threaded toreceive the reduced forward portion 42 of stroke-adjusting screw 4I. Themain upstanding portion of yoke 2| is pierced 4 clapper assembly issupported to turn, and means supporting the end portions of saidflexible mounting strip on said base member with the remainder of thestrip out of contact therewith, the ringer being ilexibly suspended onsaid strip out of direct contact with the base member.

of bifurcate spring member 38, which holds part 31 in its assembledposition, and retains part 31 by friction in its desired rotationalposition of adjustment. The enlarged rear portion of Vbias-adjustingmember 31 is provided with a longitudinal off-center opening receivingthe forward end of bias springV 36.V By a rotation of member 31 through180 degrees, the front end*4 of bias spring 36 is carried from anextreme left position of maximumV bias tension to an extreme rightposition of minimum bias tension. Ordinarily, some intermediate positionis employed.

The rear end of cores 25 are received in openings Il in upstandingportion 8 of foundation plate 4, and they may protrude somewhat to therear of portion 8, as shown in Figs. 1 and 2. Additionally, the rear endof bar magnet 24 is received on opening in upstanding part 8, suchopening beingpreferably rather accurately sized to serve as theprincipal rear guide for the slidable magnet assembly, keeping in mindthat cores 25 of the electromagnets' are effectively articui lated, withrespect to each other and to the magnet, by the resilient mountingarrangement including retaining parts 2S. It will be observed that therear end of bar magnet 24 ends slightly short of the end of cores 25,whereby the bar magnet does not directly contact armature 30 in anylposition of stroke adjustment, whereby the intended movement of thearmature cannot be interfered with incident to the sliding of the magnetassembly for stroke adjustment.

Accurate and readily controlled longitudinal positioning of the slidablemagnet assembly, according to the armature stroke desired, is obtainedby the illustrated compound stroke-adjusting screw having a threadedsection 4I and a reduced threaded section 42. Section il is threadedlyreceived in an opening in upstanding tab 6, formed integrally withfoundation plate li, vwhile the reduced portion 42 is threadedlyreceived in upstanding tab 22, formed integrally with magor steeplypitched, threads; the other part is pro- .1.;

vided With ne, or mildly pitched, threads. It is preferable that thelarger section GI be provided with the coarse threads, and that thesmaller section 42 be provided with the line threads.

Lock nut d3 retains screw H in its desired position of adjustment, suchadjustment being performed as detailed in the parent application.

Iclaim:

l. In combination, a base member, a ringer including gongs and aturnably supported armature-clapper assembly consisting of an armatureand a clapper supported thereon, and including electromagnetic meansoperatively associated with said assembly for causing said clapper tostrike said gongs, a flexible mounting strip and means securing theintermediate portion of it to the ringer with its shortest dimensiongenerally parallel to the-axis about which the armature- 2. Incombination, a base member, a ringer including gongs and a turnablysupported armature-clapper assembly consisting of an armature and aclapper supported thereon, and including electromagnetic meansoperatively associated withsaid assembly for causing said clapper tostrike said gongs, a flexible mounting stripand means securing theintermediate portion of it to the ringer outside the confines of thespace occupied by said armature-clapper assembly during 'operationthereof, and means supporting the end portions of said flexible mountingstrip on said base member with the remainder of the strip out of contacttherewith, the ringer being exibly suspended on said. strip out ofdirect contactI with the base member.

3. In combination, a base member, a Vringer including gongs and aturnably supported armature-clapper assembly consisting of an armatureand a clapper supported thereon, and including electromagnetic meansoperatively associated with said assembly for causing said clapper tomove reciprocally to strike said gongs, a flexible mounting strip andmeans securing the intermediate portion of it to the ringer, said ringerbeing constructed so that a given plane exists between said ringer andstrip on one side of which said ringer is wholly disposed, and meanssupporting the end portions of' said flexible mounting strip on saidbase member with the remainder of the strip out of contact therewith,the ringer being flexibly suspended on said strip out of direct contactwith the base member.

4. In combination as set forth in claim 3, said pla-ne being disposed sothat motion of said armature-clapper assembly is generally parallelthereto.

5. In combination, a base member, a ringer including as elements gongsand a turnably supported armature-clapper assembly consisting of anarmature and a clapper supported thereon, and including electromagneticmeans operatively associated with said assembly for causing said clapperto strike the gongs, va foundation plate of given thickness, meanssupporting said ringer elements on said plate, a flexible mounting stripsubstantially thinner than said foundation plate, means securing theintermediate portion of the strip to said foundation plate. and meanssupporting the end portions of said iiexible mounting strip on said basemember with the remainder of the strip out of Contact therewith, theringer being flexibly suspended on said strip out of direct contact withthe base member. JOSEPH F. HOUDEK, JR,

' appearances Crrnn The following' references are of record in the le ofthis patent:

UNITED STATES PATENTS

